package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.CategoryDTO;
import com.sky.dto.CategoryPageQueryDTO;
import com.sky.entity.Category;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.CategoryMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.CategoryService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

/**
 * @auther Mr.wang
 * @date 2024/11/5 - 9:59
 */
@Service
@Slf4j
public class CategoryServiceImpl implements CategoryService {

    @Autowired
    private CategoryMapper categoryMapper;
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private SetmealMapper setmealMapper;
    /**
     * 新增分类
     * @param categoryDTO
     */
    public void save(CategoryDTO categoryDTO) {

        Category category = new Category();
        BeanUtils.copyProperties(categoryDTO, category);

        //分类状态默认为禁用状态0
        category.setStatus(StatusConstant.DISABLE);
        categoryMapper.insert(category);
    }

    /**
     * 根据id删除分类
     * @param id
     */
    public void deleteById(Long id) {
        Integer count = dishMapper.countByCategoryId(id);
        //判断当前分类是否关联了菜品，如果已经关联，则抛出业务异常
        if (count > 0){
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_DISH);
        }
        count = setmealMapper.countByCategoryId(id);
        //判断当前分类是否关联了套餐,如果已经关联，则抛出业务异常
        if (count > 0){
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_SETMEAL);
        }
        //删除分类数据
        categoryMapper.deleteById(id);

    }


    /**
     *  修改分类
     * @param categoryDTO
     */
    public void update(CategoryDTO categoryDTO) {

        Category category = new Category();
        BeanUtils.copyProperties(categoryDTO, category);

        categoryMapper.update(category);
    }

    /**
     * 分类分页查询
     * @param categoryPageQueryDTO
     * @return
     */
    public PageResult pageQuery(CategoryPageQueryDTO categoryPageQueryDTO) {

        PageHelper.startPage(categoryPageQueryDTO.getPage(), categoryPageQueryDTO.getPageSize());
        Page<Category> page = categoryMapper.pageQuery(categoryPageQueryDTO);
        long total = page.getTotal();
        List<Category> records = page.getResult();

        return new PageResult(total, records);
    }


    /**
     * 启用、禁用分类
     * @param status
     * @param id
     */
    public void startOrStop(Integer status, Long id) {
        Category category = Category.builder()
                        .id(id)
                        .status(status)
                        .build();
        categoryMapper.update(category);

    }


    /**
     * 根据类型查询分类
     * @param type
     * @return
     */
    public List<Category> list(Integer type) {

        List<Category> list = categoryMapper.list(type);

        return list;
    }
}










